Main FeaturesDisplay of SpO2 value.Display of PR value and bar graph.Display of pulse waveform.Low battery indication.Automatic power off when there is no operation for one minute.Changeable display mode.Adjustable brightness.PR sound.Alarm function.Automatic storage for SpO2 and PR value.Wireless transmission.The data stored can be uploaded to APP by Bluetooth, APP will upload the data to CLOUD platform for analyzing.